65465663712 has 96 divisors (see below), whose sum is σ = 181144454400. Its totient is φ = 20644512768.

The previous prime is 65465663677. The next prime is 65465663717. The reversal of 65465663712 is 21736656456.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×65465663712³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65465663717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1301364 + ... + 1350732.

It is an arithmetic number, because the mean of its divisors is an integer number (1886921400).

Almost surely, 2^65465663712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65465663712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90572227200).

65465663712 is an abundant number, since it is smaller than the sum of its proper divisors (115678790688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65465663712 is a wasteful number, since it uses less digits than its factorization.

65465663712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50128 (or 50120 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 51.

The spelling of 65465663712 in words is "sixty-five billion, four hundred sixty-five million, six hundred sixty-three thousand, seven hundred twelve".